Preparation and ductile-to-brittle transition temperature of the La-TZM alloy plates

摘要: Abstract Powder metallurgy methods were utilized to prepare lanthanum-doped titanium–zirconium–molybdenum (La-TZM) and traditional TZM alloy plates. Tensile Charpy impact tests employed study the room temperature cryogenic mechanical properties of two kinds alloys. For same process conditions, lanthanum doping has significantly improved tensile strength elongation, which increased by 28.2% 32.8%, respectively. these La-TZM higher density smaller evenly distributed secondary phases. Compared with TZM, phase in is finer, hinders spreading cracks. This why plates have elongation. By lanthanum, ductile-to-brittle transition decreased from − 80 °C − 120 °C. The La particles refine grain hinder fracture expansion across grains during alloy. expand its application range.